Its a shame how everyone is writing Bleach off!!! Its my favourite out of the Big 3 and it is probably going through the best arc its ever had so its a pity to see it falling down in popularity and sales! However all good things must unfortunately come to an end. I guess they are not as popular any more as people want change and animes like Fairy Tail and Toriko are beginning to become a lot more popular and are stealing the lime light.

I really did like bleach in the beginning, but then it became a filler fest for the filler happy and i lost interest in the anime, though i still read the manga.

One piece has got to still be my number one favorite, though i do love Naruto too since thats the first anime i was introduced to.
So i guess... One piece, naruto and Gintama (i know gintama isnt in the big three, it is for me though) for me ^^"

I like One Piece because it has that awesome adventure theme like older Shonen Jump series. Always traveling,never staying in one place. The Devil Fruit is a awesome concept and I love the powers you get from eating them. The characters are enjoyable to watch at all times. When they are serious and goofy

I like Bleach because Ichigo is a GOAT. I believe Tite Kubo has the best character designs out of the three artists. Especially when the characters are in casual clothes. The first arc,the hollow extermination days was awesome. It was exciting to see those giant black monsters that were once people now eat them and seeing Ichigo come kill them off while meeting new characters. Zanpoktos are awesome swords and seeing all their different abilities is also awesome to watch. The introduction of espada and arrancar boosted up the series even more. And how Aizen was basically the main antagonist for the series had a DBZ feel. Like how Frieza was the main antagonist before he was killed

Naruto has ninjas. Ninjas who wear bright ass clothing but ninjas none the less. The reason Naruto not Shippuden was very appealing because Mashashi Kishimoto copied the shit out of Yoshihiro Togashi's HunterxHunter. Shippuden is all over the place but Naruto was cool because the reason I just listed.

After Bleach finishes my big three would be

1)One Piece
2)Toriko
3)Gintama

(I WOULD have HunterxHunter instead of Toriko but Togashi does not follow a weekly schedule at all so. :/ )

NOTE:I am speaking of the manga for all three of them and NOT the anime

There are only 2 long running shounen series that didn't bore me or go down hill at some point. Those are Yu Yu Hakusho and Hajime no Ippo. One Piece would be up there, but the Skypia Arc was pretty meh. I haven't seen Hunter X Hunter, but will eventually. Not sure if Gintama counts here either, but I do like it quite a bit.

One Piece is the best of the big three.
The original Naruto was fine before 100ish episodes of filler struck. I've only seen 32 of Shippuden which I like a bit more.
Only seen 4 episodes of Bleach, I'll eventually watch through the Soul Society Arc since that's apparently the best part of it.

They're all massively over rated, and I don't really care much for them, nor their very loud and obnoxious fanboys/girls that swear these are the best shows to grace the planet and attack everyone who disagrees.